class User:
    def __init__(self,first_name,last_name,aihao,login_attempts):
        self.first_name=first_name
        self.last_name=last_name
        self.aihao=aihao
        self.login_attempts=login_attempts
    def describe_user(self):
        print(f"{self.first_name} {self.last_name} {self.aihao}")
    
    def greet_user(self):
        self.first_name=self.first_name.title()
        self.last_name=self.last_name.title()
        print(f"Hello {self.first_name} {self.last_name}")
    
    def increment_login_attempts(self):
        self.login_attempts += 1